rails                   
                                          
                                          
  
                                          
  
                                          
                                          
 trains  are  so  constructed  that  they 
 have to  follow a set path. this path is 
 called a "railway",  which is  comprised 
 of two metal rails, hence its  nickname. 
                                          
 because  the  low friction  between  the 
 wheels of the train and the  rail metal, 
 there are limits  for how  acute a curve 
 can be,  and  even more  so for how much 
 the  ground  under  the   rails  can  be 
 sloped. thus a railway  is often not led 
 on top of  hills, rather through them in 
 tunnels   (if   they   are   large),  or 
            artificial chasms.            
                                          
 there will be  trees on  the side of the 
 rails, but not  too close, or they  will 
 be cut  down  by  the  railway janitors. 
 there  will  be  plains,  and bodies  of 
                  water.                  
                                          
 trains  go  by day and  by night.  along 
      the way, there is information       
 scattered,  often  put  on top of poles, 
 to be interpreted by the  train drivers. 
 different  parts  of  the  railway  have 
          different speed limits.         
                                          
 sometimes, trains have to  stop and wait 
 for something to happen, far away.  this 
 is  signaled  by  red  or  green lights. 
                                          
                                  
                                          
 many people follow  the  rails  by foot. 
 often  this  proves to  be  the  shorter 
 path between  two  points. however  this 
 is   frowned  upon,  and  very  impolite 
        toward the train drivers!